---
cve: "CVE-2026-73053"
severity: "CRITICAL"
cvss: 9.4
epss: "28%"
vendor: "siyuan-note"
kev: false
exploited: false
published: "2026-08-15 22:16:55"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-06T12:33:25+02:00"
---

# CVE-2026-73053

> 9.4 CRITICAL · 🧪 PoC

## Beschreibung

SiYuan versions before v3.7.4 contain a cross-site scripting vulnerability in the unicode2Emoji function that fails to sanitize codepoint branch output. Attackers can craft document icons with hex-encoded markup that executes in the renderer with Node integration enabled, achieving arbitrary code execution on the host system.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |

## Referenzen

- <https://github.com/siyuan-note/siyuan/security/advisories/GHSA-vx5w-qrvp-mmcq>
- <https://www.vulncheck.com/advisories/siyuan-before-cross-site-scripting-via-unicode2emoji>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-73053) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_